The Study Of The Surface Topography And Process During Turning-milling Machine Of The Landing Gear

Landing gear sleeve is an significant component of the aircraft,the reliability of the landing gear is important to the flight safety. landing gear sleeve is shape-complicated and exist many mating surfaces, the surface topography of the landing gear sleeve determine the fatigue performances and the stability.At present,the requirement of the roughness in producer is Ra1.6~Ra3.2,which requires producer to rely on the experienced engineers to choose suitable parameter. turn-milling compound machining process offer us the way to reduce the cumulative error and to Improve efficiency when machining Landing gear, but domestic turn-milling compound machining process is in the primary stage,the choosen of the process and the parameter still depends on experience,the workshop information still rely on the drawings,which decreases productivity of the producer.This article will focus on the choose of the parameter and turn-milling compound machining process.Studied the mathematical model of the orthogonal turning-milling, trochoidal milling, spiral milling during the process,and verified the model by experiment, then analyzed the change regulation of the surface topography along with the process parameter by orthogonal test, and optimized the parameter by this regulation. Finally according to the machining result, when orthogonal turning-milling machined the cylinder of the landing gear, optimized parameter could produce better surface topography, when machining eccentric cavity, optimized parameter could produce better surface topography,too,and trochoidal milling, spiral milling could produce better surface than Plain milling.Developed the 3D-CAPP sofetware with the KM soft company, presented the function of the 3D-CAPP,Finally,applied in the AVIC Landing Gear Changsha Division.